Headboard



FIG. 1 is a perspective view of a headboard, showing my new design;

FIG. 2 is a front elevational view thereof; the rear elevational view being substantially similar to the view shown in FIG. 3;

FIG. 3 is a left side elevational view thereof; the right side elevational view being the mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a headboard, as shown and described. 